<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>商品管理</el-breadcrumb-item>
            <el-breadcrumb-item>参数列表</el-breadcrumb-item> 
        </el-breadcrumb>


        <!-- 卡片视图区域 -->
        
        <el-card>
            <!-- 警告区域 -->
            <el-alert title="注意：至允许为第三级分类设置相关参数" show-icon  type="warning" :closable="false"></el-alert>
        
            <!-- 选择商品分类区域 -->
            <el-row class="cat_opt">
                <el-col>
                    <span>选择商品分类</span>
                    <!-- 选择商品分类的级联选择框 -->
                    <el-cascader v-model="selectedCateKeys" :options="CateList" :props="cateProps"
    @change="handleChange"></el-cascader>
                </el-col>
            </el-row>

            <!-- Tab页签区域 -->
            <el-tabs v-model="activeName" @tab-click="handleTabClick">
                <!-- 添加动态参数的面板 -->
                <el-tab-pane label="动态参数" name="many">
                    <!-- 添加参数按钮 -->
                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加参数</el-button>
                    <!-- 动态参数表格 -->
                    <el-table :data="manyTableDate" border stripe>
                        <!-- 展开行 -->
                        <el-table-column type="expand" >
                             <!-- eslint-disable-next-line -->
                            <template slot-scope="slotprops">
                                <!-- 循环渲染tag标签 -->
                                <el-tag :key="i" v-for="(item,i) in slotprops.row.attr_vals" closable @close="handleClose(i,slotprops.row)">{{item}}</el-tag>
                                <!-- 输入文本框 -->
                                <el-input v-if="slotprops.row.inputVisible" v-model="slotprops.row.inputValue" ref="saveTagInput" size="small" class="input-new-tag" @keyup.enter.native="handleInputConfirm(slotprops.row)" @blur="handleInputConfirm(slotprops.row)"></el-input>
                                <!-- 添加的按钮 -->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(slotprops.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>
                        <!-- 索引列 -->
                        <el-table-column type="index" label="#"></el-table-column>
                        <el-table-column prop="attr_name" label="参数名称"></el-table-column>
                        <el-table-column  label="操作">
                            <!-- eslint-disable-next-line -->
                            <template slot-scope="slotprops">
                                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(slotprops.row.attr_id)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(slotprops.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>

                </el-tab-pane>

                <!-- 添加静态属性的面板 -->

                <el-tab-pane label="静态属性" name="only">
                    <!-- 添加属性按钮 -->

                    <el-button type="primary" size="mini" :disabled="isBtnDisabled" @click="addDialogVisible=true">添加属性</el-button>
                    <!-- 静态属性表格 -->
                    <el-table :data="onlyTableDate" border stripe>
                        <!-- 展开行 -->
                                                <el-table-column type="expand" >
                             <!-- eslint-disable-next-line -->
                            <template slot-scope="slotprops">
                                <!-- 循环渲染tag标签 -->
                                <el-tag :key="i" v-for="(item,i) in slotprops.row.attr_vals" closable @close="handleClose(i,slotprops.row)">{{item}}</el-tag>
                                <!-- 输入文本框 -->
                                <el-input v-if="slotprops.row.inputVisible" v-model="slotprops.row.inputValue" ref="saveTagInput" size="small" class="input-new-tag" @keyup.enter.native="handleInputConfirm(slotprops.row)" @blur="handleInputConfirm(slotprops.row)"></el-input>
                                <!-- 添加的按钮 -->
                                <el-button v-else class="button-new-tag" size="small" @click="showInput(slotprops.row)">+ New Tag</el-button>
                            </template>
                        </el-table-column>

                        <!-- 索引列 -->
                        <el-table-column type="index" label="#"></el-table-column>
                        <el-table-column prop="attr_name" label="静态属性"></el-table-column>
                        <el-table-column  label="操作">
                            <!-- eslint-disable-next-line -->
                            <template slot-scope="slotprops">
                                <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditDialog(slotprops.row.attr_id)">编辑</el-button>
                                <el-button type="danger" icon="el-icon-delete" size="mini" @click="deleteParams(slotprops.row.attr_id)">删除</el-button>
                            </template>
                        </el-table-column>
                    </el-table>

                </el-tab-pane>
    
            </el-tabs>


        </el-card>

        <!-- 添加参数对话框 -->
        <el-dialog :title="`添加${this.titleText}:`" :visible.sync="addDialogVisible" width="50%" @close = "addDialogClosed">
            <!-- 添加参数表单 -->
            <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px">
                <el-form-item :label="this.titleText" prop="attr_name">
                    <el-input v-model="addForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="addDialogVisible=false">取 消</el-button>
                <el-button type="primary" @click="addParams">确 定</el-button>
            </span>
        </el-dialog>

        <!-- 修改参数对话框 -->
                <el-dialog :title="`添加${this.titleText}:`" :visible.sync="editDialogVisible" width="50%" @close = "editDialogClosed">
            <!-- 添加参数表单 -->
            <el-form :model="addForm" :rules="editFormRules" ref="editFormRef" label-width="100px">
                <el-form-item :label="this.titleText" prop=" attr_name">
                    <el-input v-model="editForm.attr_name"></el-input>
                </el-form-item>
            </el-form>
            <span slot="footer" class="dialog-footer">
                <el-button @click="editDialogVisible=false">取 消</el-button>
                <el-button type="primary" @click="editParams">确 定</el-button>
            </span>
        </el-dialog>

    </div>
</template>


<script>

export default {
    data:function(){
        return{
            // 商品分类列表
            CateList:[],
            // 级联选择框的配置对象
            cateProps:{
                expandTrigger: 'hover' ,
                value:'cat_id',
                label:'cat_name',
                children:'children'
            },
            // 级联选择器选择框双向绑定到的事件
            selectedCateKeys:[],

            //被激活的页签名称  
            activeName:'many',
            // 静态属性表格数据
            onlyTableDate:[],
            
            // 动态参数表格数据
            manyTableDate:[],

            // 控制添加对话框的显示和隐藏
            addDialogVisible:false,

            // 添加表单数据对象
            addForm:{
                attr_name :'',
            },
            // 添加表单的验证规则
            addFormRules: {
                attr_name :[
                    {required:true,message:'请输入参数名称',trigger:'blur'}
                ]

            },

            // 控制修改时间对话框的展示和隐藏
            editDialogVisible:false,

            // 编辑表单数据对象
            editForm:{
                attr_name :'',
            
            },
            // 修改表单的验证规则
            editFormRules: {
                attr_name :[
                    {required:true,message:'请输入内容',trigger:'blur'}
                ]

            },

            
        }
    },
    created(){
        this.getCateList();
    },
    computed:{
        // 若果按钮需要被禁用则返回true 否则返回false
        isBtnDisabled() {
            if(this.selectedCateKeys.length!=3){
                return true
            }else{
                return false
            }
        },
        //当前选中的三级数据的id
        cateId(){
            if(this.selectedCateKeys.length == 3){
                return this.selectedCateKeys[2]
            }else{
                return null
            }
        },
        // 动态计算标题的属性
        titleText(){
            if(this.activeName == 'many'){
                return '动态参数'
            }else{
                return '静态属性'
            }
        }
    },
    methods:{
        // 获取所有商品分类
        getCateList: async function(){
            const {data:res} = await this.$http.get('categories');
            console.log(res);
            if(res.meta.status != 200){
                return this.$message.error('获取商品分类失败');
            }else{
                this.CateList = res.data
            }
        },
        //级联选择框中变化，会触发这个函数
        handleChange:  function(){
                // console.log(this.selectedCateKeys);
                // 证明选中的不是三级分类，立即退出，并且将this.selectedCateKey清空
                if(this.selectedCateKeys.length!=3){
                    this.selectedCateKeys = []
                    this.manyTableDate = []
                    this.onlyTableDate = []
                    return
                }else{
                    //选中的是三级分类
                    // console.log(this.selectedCateKeys);
                   this.getParamsData();
                }
        },
        // tab页签点击事件处理函数
        handleTabClick: function(){
            console.log(this.activeName);
            this.getParamsData()
        },
        //获取数据列表参数
        getParamsData: async function(){
             //根据所选分类的id和当前Tab页签区域分类的面板发送数据请求
            const {data:res} = await this.$http.get(`categories/${this.cateId}/attributes`,{
                    params:{ id:this.cateId , sel:this.activeName}
                    });
                if(res.meta.status!=200){
                    return this.$message.error('获取参数列表失败')
                }else{
                    console.log(res.data);
                    res.data.forEach(item => {
                        item.attr_vals = item.attr_vals?item.attr_vals.split(" "):[];
                        //控制文本框的显示和隐藏
                        item.inputVisible = false;
                        // 文本框中输入的值
                        item.inputValue = ''
                    })



                    // 先判断数据是动态参数还是静态属性，保存到不同的数据中
                    if(this.activeName == 'many'){
                        this.manyTableDate = res.data
                    }else{
                        this.onlyTableDate = res.data
                    }
                }
        },

        // 添加参数
        //监听添加对话框的关闭事件
        addDialogClosed:function(){
            this.$refs.addFormRef.resetFields()
        },
        // 点击按钮，添加参数
        addParams:function(){
            this.$refs.addFormRef.validate(async vaild=>{
                if(!vaild ){
                    return error
                }else{
                    const {data:res} = await this.$http.post(`categories/${this.cateId}/attributes`,{
                        attr_name:this.addForm.attr_name,
                        attr_sel:this.activeName});
                        // console.log(this.addForm);
                        if(res.meta.status!==201){
                            return this.$message.error('添加参数失败！')
                        }else{
                            this.$message.success('添加参数成功！');
                            this.getParamsData();
                            this.addDialogVisible = false
                        }
                }
            })
        },

        // 修改参数
        // 点击按钮，展示修改对话框
        showEditDialog:async function(id){
            const{data:res} = await this.$http.get(`categories/${this.cateId}/attributes/${id}`,{
                params:{attr_sel:this.activeName}
            });
            if(res.meta.status!==200){
                return this.$message.error('添加参数信息失败！')
            }else{
                           
                this.editForm = res.data
                            
            }
            this.editDialogVisible = true    
        },
         //修改添加对话框的关闭事件
        editDialogClosed:function(){
            this.$refs.editFormRef.resetFields()
        },
        //点击按钮，修改参数
        editParams:function(){
            this.$refs.editFormRef.validate(async  valid=>{
                if(!valid){
                    return
                }else{
                    console.log(this.editForm.attr_name);
                    const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${this.editForm.attr_id}`,{
                        attr_name: this.editForm.attr_name,
                        attr_sel: this.activeName
                    });
                    if(res.meta.status !=200){
                        return this.$message.error('修改参数失败')
                    }else{
                        this.$message.success('修改参数成功')
                        this.getParamsData();
                        this.editDialogVisible = false


                    }
                }
            })
        },
        //点击按钮根据id，删除分类参数
        deleteParams: async function(id){
            const res = await this.$confirm('此操作将永久删除该参数, 是否继续?', '提示', {
                    confirmButtonText: '确定',
                    cancelButtonText: '取消',
                    type: 'warning'
            }).catch(err=>err)
            if(res !='confirm'){
                return this.$message.info('已经取消操作')
            }  else{
                const {data:res} = await this.$http.delete(`categories/${this.cateId}/attributes/${id}`)
                if(res.meta.status!=200){
                    return this.$message.error('删除参数失败')
                }else{
                    this.$message.success('删除参数成功')
                        this.getParamsData();
                        
                }
            }
        },
        //将对attr—vals的操作封装一个函数
        /* saveAttrValue: async function(row){
            const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                    attr_name:row.attr_name,
                    attr_sel:row.attr_sel,
                    attr_vals:row.attr_vals.join(' ')
                })
                if(res.meta.status!=200){
                    return this.$message.error('修改该参数失败')
                }else{
                    this.$message.success('修改该参数成功')
                }
        }, */

        //展开行中文本框失去焦点货按下enter触发事件
        handleInputConfirm:async function(row){
            if(row.inputValue.trim().length ==0 ){
                row.inputVisible = false;
                row.inputValue = ''
                return
            }else{
                //若果没有return 则需要后续处理
                row.attr_vals.push(row.inputValue.trim());
                row.inputVisible = false;
                row.inputValue = ''
                // 需要发起请求 保存本次操作
               const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                    attr_name:row.attr_name,
                    attr_sel:row.attr_sel,
                    attr_vals:row.attr_vals.join(' ')
                })
                if(res.meta.status!=200){
                    return this.$message.error('修改该参数失败')
                }else{
                    this.$message.success('修改该参数成功')
                }
            }
        },
        // 展开行中点击按钮展示输入框 
        showInput:function(row){
            row.inputVisible = true
            // 让文本框自动获取焦点
            //  this.$nextTick方法的作用是当页面上的元素被重新渲染之后，才会执行回调函数中的代码
            this.$nextTick(_ => {
                this.$refs.saveTagInput.$refs.input.focus();
            });
        } ,
        // 删除对应的参数可选项
         handleClose: async function(i,row){
             row.attr_vals.splice(i,1);
             const {data:res} = await this.$http.put(`categories/${this.cateId}/attributes/${row.attr_id}`,{
                    attr_name:row.attr_name,
                    attr_sel:row.attr_sel,
                    attr_vals:row.attr_vals.join(' ')
                })
                if(res.meta.status!=200){
                    return this.$message.error('修改该参数失败')
                }else{
                    this.$message.success('修改该参数成功')
                }
         } 
    },
}
</script>



<style lang="less" scoped>
    .cat_opt {
        margin: 10px 0;
    }
    .el-tag {
        margin: 10px;
    }
    .input-new-tag{
        width: 120px;
    }
</style>